body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: url('https://image.guiyunweb.com/2021/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20211102155315_1635839655154.jpg?imageMogr2/format/webp/interlace/1/quality/090') no-repeat center center fixed; /* Use your own background image */
    background-size: cover;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: #333;
}

.header {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-bottom: 1px solid #ccc;
}

.header h1 {
    margin: 0;
    font-size: 2.5em;
}

.header p {
    margin: 10px 0 0;
    font-size: 1.2em;
}

.container {
    position: relative;
    width: 100%;
    height: calc(100vh - 100px); /* Subtract header height */
}

.raindrop {
    position: absolute;
    top: -100px; /* Increased to start off-screen */
    font-size: 1.2em;
    background: rgba(255, 255, 255, 0.7); /* Lowered opacity */
    padding: 20px;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    animation: fall 5s ease-in infinite; /* Shortened animation duration */
    white-space: nowrap;
}

@keyframes fall {
    0% {
        transform: translateY(-100px);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0;
    }
}


